Resume Examples

IT Systems Administrator Resume Example & Guide for 2026

IT systems administrator resumes are screened first for certifications and specific platform experience, then for proof you can keep systems up, secure, and fast. This guide shows you how to translate day-to-day sysadmin work into uptime numbers, ticket reductions, and migration wins that pass both the ATS scan and the hiring manager's read.

IT systems administrators maintain servers, networks, cloud infrastructure, and end-user systems, handling everything from Active Directory and patch management to backup strategy and incident response. Recruiters and ATS filters look first for certifications (CompTIA, Microsoft, Cisco, AWS/Azure) and named platforms, then for evidence of reliability and efficiency: uptime percentages, ticket resolution times, systems supported, and cost savings from automation or consolidation. A resume that lists 'managed servers' without scale, tools, or outcomes reads as unverifiable, since this role is judged almost entirely on measurable operational impact.

Key Skills

  • Windows Server and Active Directory administration
  • Linux server administration (RHEL, Ubuntu)
  • Virtualization (VMware, Hyper-V)
  • Cloud infrastructure (AWS, Azure, or Google Cloud)
  • Network administration (TCP/IP, DNS, DHCP, VPN)
  • Backup and disaster recovery planning
  • Patch management and endpoint security
  • PowerShell / Bash scripting and automation
  • IT service management (ServiceNow, Jira Service Management)
  • Firewall and security configuration
  • Microsoft 365 / Google Workspace administration
  • Monitoring and alerting tools (Nagios, Zabbix, Datadog, SolarWinds)

Sample Resume Bullets

  1. Junior / help desk to sysadmin transition: Administered Active Directory for 320 user accounts across 3 office locations, reducing average password/access ticket resolution time from 45 minutes to 12 minutes by automating common requests with PowerShell.
  2. Mid-level, infrastructure focus: Migrated on-premises file servers for 450 users to Microsoft 365 and SharePoint Online, eliminating $28,000 in annual hardware and licensing costs and achieving 99.95% uptime post-migration.
  3. Mid-level, security focus: Deployed and tuned an endpoint detection and response (EDR) solution across 600 endpoints, cutting confirmed malware incidents from 14 per quarter to 2.
  4. Senior systems administrator: Led virtualization of 60 physical servers onto a VMware vSphere cluster, reducing data center footprint by 70% and cutting annual power and cooling costs by $46,000.
  5. Senior, cloud/hybrid focus: Architected a hybrid backup and disaster recovery solution using Azure Site Recovery, reducing recovery time objective (RTO) from 8 hours to 45 minutes across 25 critical systems.
  6. IT manager / lead sysadmin: Managed a 5-person infrastructure team supporting 900 endpoints and 40 servers, maintaining 99.98% network uptime and reducing average help desk ticket backlog from 120 to under 20 open tickets.

ATS Keywords

  • Active Directory
  • Windows Server
  • Linux administration
  • network administration
  • virtualization (VMware/Hyper-V)
  • cloud infrastructure (AWS/Azure)
  • disaster recovery
  • patch management
  • PowerShell scripting
  • Microsoft 365 administration
  • ITIL
  • TCP/IP
  • endpoint security
  • system monitoring
  • help desk escalation

Common Mistakes

  • Listing certifications without expiration or renewal status. — Include the certification name, issuing body, and date earned (or 'in progress'); expired certs listed as current can disqualify a candidate during verification.
  • Describing responsibilities without scale ("managed company servers"). — Add numbers: how many servers, users, or endpoints, and what environment (on-prem, cloud, hybrid).
  • Omitting uptime, downtime, or incident response metrics entirely. — Include at least 2-3 bullets with uptime percentage, mean time to resolution (MTTR), or incident reduction numbers.
  • Failing to mention security frameworks or compliance work (HIPAA, SOC 2, PCI-DSS). — Name any compliance standards you've worked within; this is a hard screening filter for regulated industries like healthcare and finance.
  • Using outdated platform experience as the resume's main selling point. — Lead with current, in-demand skills (cloud, automation, security) and move legacy systems experience further down or into a secondary skills list.

Formatting Tips

  • Put a 'Certifications' section near the top, directly below the summary, listing cert name, issuer, and year.
  • Use a skills-grouped format (Systems, Networking, Cloud, Security) rather than one long undifferentiated list.
  • Quantify environment scale in each role (number of servers, endpoints, users, or sites supported).
  • List specific tools and platforms by name; ATS parsing for sysadmin roles is heavily keyword-matched.
  • Keep formatting simple and single-column so ATS software parses server and tool names correctly.
  • Cap the resume at two pages if you have 8+ years and multiple certifications; one page for under 5 years.

Resume examples